If you have a fume hood that's good of course, but since the question was about advising amateurs on safety, my advice is restrictive, because gases can be very dangerous in subtle ways.

As an amateur: Do you know how to properly work in a fume hood so that it protects you? Do you know its capacity, and what to do if something unexpected leads to gas development over that capacity? Have you had training in using this stuff, so that you can react properly and quickly if something goes wrong, rather than freezing up?

In short: Because the potential dangers when working with a lot of gases are harder to detect, and harder to mitigate, than when working with other stuff, I'm taking a restrictive approach in my advice.

For you question on pyrophoric gases: They can remain in contact with air for a while (several minutes, depending on concentration) before igniting. Worst case, the room around you can fill with gas from a leak before causing a gas explosion. In principle you can also inhale gas from this leak, such the the explosion also takes place inside you :)